Lumapro Trade Number H7-55LL, 55 Watts Miniature Halogen Bulb, T3-1/2, Right Angle Prefocus (PX26d)

These T-shaped miniature light bulbs have a right-angle prefocus base. This style of base is typically used on automotive light bulbs to allow them to fit into tight spaces where there is minimal space for a light bulb and socket. The bulbs are pushed into a compatible socket when installing them. Prefocus bases have a ring or collar that helps ensure the bulbs are properly aligned in the socket.